A sophisticated band of con artists fleeces the greedy and corrupt "marks" they encounter in London. Initially, they are led by Mickey Stone, a master of very complicated "long cons" whom the police acknowledge as being in a class of his own. When Mickey heads to Australia to set up a major job, he is replaced by his protege, Danny Blue, an impetuous former pickpocket who unfortunately keeps forgetting to come up with a "Plan B" in case a con goes awry.